After the battle, cross the bridge to the north and talk to the nearby Trainer with his Mamoswine. This Mamoswine is used to traverse Route 17. You need to find his buddy before he will go back to the route.

You won't be able to go up the path to the west, it's a one way trail down. Head across the ice path to the east to delve deeper into the cave. There will be a number of ice paths inside this cave. Once you step on them, you will slide until you hit a rock or a wall.

Up Ahead is another cave entrance. Enter this cave and investigate the rock to the left to find a hidden Dire Hit. Exit back out and slide across the ice path to the east. Another Pokemon Trainer will be at the other end of the icy floor.

Slide up the ice path and investigate the rock on the right side to find another hidden Ice Heal. From the item, slide down, right, down, left, up, walk a few steps down to the last solid snow floor before the ice, and then slide left to a Pokemon Trainer.

To the north of the trainer through a small path is another Ice Heal, but this one won't be hidden.

Continue into the cave to the southwest. Not far ahead are two ice paths that extend further west. The northern path leads to a single trainer, and the southern path lead to two trainers who will challenge you to a Double Battle. If you take the northern path, you can surf on the river to the west, and you can challenge the two trainers to a Double Battle in addition to the Single Battle from the northern path!

In this room is a large rock covered with ice. If you wish to evolve Eevee into Glaceon, you need to level it up around here. There's also an Icy Rock in this room that will extend the life of Hail inside of battle.

Return to the last area and take the path southwest to another ice path. Investigate the rocks around here to find a hidden Pearl. Slide south and continue on.

To the right is a Max Repel. To reach this item, walk to the left after reaching solid ground, slide up to a rock, and slide to the right.

Before going down to the next floor, slide horizontally along the ice path to reach the river to the west. Surf south below the three rocks to reach the Never-Melt Ice.

At the top of the stairs is another large ice path. Use this path to slide around to an Ether on the left. Grab the item and return to the starting position to the south. From the solid ground, slide north to a Pokemon Trainer walking around more solid floor.

To the southeast is a very hard to reach path if you don't know how to slide around. Head next to the black belt from earlier, walk as far left as you can on the solid snow ground (before the ice floor), and slide south and east to another Pokemon Trainer.

After the battle, slide southeast until you reach a Zinc. Another set of stairs will lead down south. The next room has an ice floor with TM79Frost Breath to the southeast. To reach it, slide to the southeast corner, then slide diagonally to the northwest. You'll hit a rock that allows you to slide south to the TM.

Return to the last room and head north. Team Flare will be harassing an Abomasnow. Interrupt them and challenge them to a Pokemon Battle.

Team Flare will take off shortly after defeat. Talk to the Abomasnow to obtain Abomasite. Southeast of Abomasnow is some sort of pit. To the right of that pit is a small space facing the northern part of the wall. That wall holds a PP Up.

Now that Abomasnow has been rescued, the Mamoswine from earlier will return to Route 17. That should be your next destination!

Surf down the waterfall to the northwest of the entrance from Dendemille Town. At the bottom of the waterfall is a Heart Scale. Continue surfing east along the river until you find snow to the south. Jump on this snow and walk south to TM71Stone Edge.